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  <title>将文件导入为大型对象</title>
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  <div id="layout-content"><div id="function.pg-lo-import" class="refentry">
   <div class="refnamediv">
    <h1 class="refname">pg_lo_import</h1>
    <p class="verinfo">(PHP 4 &gt;= 4.2.0, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">pg_lo_import</span> &mdash; <span class="dc-title">将文件导入为大型对象</span></p>

   </div>
 
 <div class="refsect1 description" id="refsect1-function.pg-lo-import-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>pg_lo_import</strong></span>
    ([ <span class="methodparam"><span class="type">resource</span> <code class="parameter">$connection</code></span>
   ], <span class="methodparam"><span class="type">string</span> <code class="parameter">$pathname</code></span>
   [, <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$object_id</code></span>
  ] ) : <span class="type">int</span></div>

   <p class="para rdfs-comment">
   <span class="function"><strong>pg_lo_import()</strong></span> creates a new large object
   in the database using a file on the filesystem as its data
   source.
  </p>
    <p class="para">
    要使用大型对象（lo）接口，需要将其放置在事务块中。
  </p>
  <blockquote class="note"><p><strong class="note">Note</strong>: <span class="simpara">当启用
<a href="features.safe_mode.html" class="link">安全模式</a>时，
PHP 会检查被操作的文件或目录是否与被执行的脚本有相同的 UID（所有者）。</span></p></blockquote>
  <blockquote class="note"><p><strong class="note">Note</strong>: 
   <p class="para">
    本函数以前的名字为 <span class="function"><strong>pg_loimport()</strong></span>。
   </p>
  </p></blockquote>
   </div>


 <div class="refsect1 parameters" id="refsect1-function.pg-lo-import-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
     <dt>
<code class="parameter">connection</code></dt>

     <dd>

      <p class="para">
       PostgreSQL database connection resource.  When 
       <code class="parameter">connection</code> is not present, the default connection 
       is used. The default connection is the last connection made by 
       <span class="function"><a href="pg_connect.html" class="function">pg_connect()</a></span> or <span class="function"><a href="pg_pconnect.html" class="function">pg_pconnect()</a></span>.
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">pathname</code></dt>

     <dd>

      <p class="para">
       变量指明了要导入为大型对象的文件名。
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">object_id</code></dt>

     <dd>

      <p class="para">
       If an <code class="parameter">object_id</code> is given the function
       will try to create a large object with this id, else a free
       object id is assigned by the server. The parameter
       was added in PHP 5.3 and relies on functionality that first
       appeared in PostgreSQL 8.1.
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.pg-lo-import-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   导入成功则返回新建的大型对象的 <var class="varname"><var class="varname">OID</var></var>，如果出错则返回 <strong><code>FALSE</code></strong>。
  </p>
 </div>


 <div class="refsect1 changelog" id="refsect1-function.pg-lo-import-changelog">
  <h3 class="title">更新日志</h3>
  <p class="para">
   <table class="doctable informaltable">
    
     <thead>
      <tr>
       <th>版本</th>
       <th>说明</th>
      </tr>

     </thead>

     <tbody class="tbody">
      <tr>
       <td>5.3.0</td>
       <td><p class="para">
        The optional <code class="parameter">object_id</code> was added.
       </p></td>
      </tr>

      <tr>
       <td>4.2.0</td>
       <td><p class="para">
        在 PHP 4.2.0 版本之前，本函数语法不一样，见如下定义：
        <div class="methodsynopsis dc-description">
         <span class="methodname"><strong>pg_lo_import</strong></span>
          ( <span class="methodparam"><span class="type">string</span> <code class="parameter">$pathname</code></span>
         [, <span class="methodparam"><span class="type">resource</span> <code class="parameter">$connection</code></span>
        ] ) : <span class="type">int</span></div>

       </p></td>
      </tr>

     </tbody>
    
   </table>

  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-function.pg-lo-import-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-2503">
    <p><strong>Example #1 <span class="function"><strong>pg_lo_import()</strong></span> 例子</strong></p>
    <div class="example-contents">
<div class="phpcode"><pre><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />&nbsp;&nbsp;&nbsp;$database&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">pg_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">"dbname=jacarta"</span><span style="color: #007700">);<br />&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">pg_query</span><span style="color: #007700">(</span><span style="color: #0000BB">$database</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"begin"</span><span style="color: #007700">);<br />&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">$oid&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">pg_lo_import</span><span style="color: #007700">(</span><span style="color: #0000BB">$database</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">'/tmp/lob.dat'</span><span style="color: #007700">);<br />&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">pg_query</span><span style="color: #007700">(</span><span style="color: #0000BB">$database</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"commit"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</pre></div>
    </div>

   </div> 
  </p>
 </div>

 
 <div class="refsect1 seealso" id="refsect1-function.pg-lo-import-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="pg_lo_export.html" class="function" rel="rdfs-seeAlso">pg_lo_export()</a> - 将大型对象导出到文件</span></li>
    <li class="member"><span class="function"><a href="pg_lo_open.html" class="function" rel="rdfs-seeAlso">pg_lo_open()</a> - 打开一个大型对象</span></li>
   </ul>
  </p>
 </div>

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